9001021011 has 4 divisors (see below), whose sum is σ = 12001361352. Its totient is φ = 6000680672.

The previous prime is 9001020949. The next prime is 9001021021. The reversal of 9001021011 is 1101201009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9001021011 - 2⁶ = 9001020947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9001021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500170166 + ... + 1500170171.

It is an arithmetic number, because the mean of its divisors is an integer number (3000340338).

Almost surely, 2^9001021011 is an apocalyptic number.

9001021011 is a deficient number, since it is larger than the sum of its proper divisors (3000340341).

9001021011 is a wasteful number, since it uses less digits than its factorization.

9001021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000340340.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 9001021011 is about 94873.7108529017. The cubic root of 9001021011 is about 2080.1624789096.

The spelling of 9001021011 in words is "nine billion, one million, twenty-one thousand, eleven".